<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

<div class="ao"></div>

<style>
  .ao {
      display: inline-block;
      width: 0;
    }
 .ao:before {
    content: "love你love";
    outline: 2px solid #cd0000;
    color: #fff;
}
</style>

</body>
</html>